Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 1 - Section 1.2 - Assess Your Understanding - Vocabulary and Skill Building - Page 20: 9

Answer

Observational study.

Work Step by Step

The selected children were living in their houses before the experiment. No attempt was made to influence the value of the explanatory variable (the proximity to high-tension wires).
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